源码分享：仿余额宝数字跳动效果 TextCounter

<com.github.premnirmal.textcounter.CounterView

 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginBottom="20dp"
 android:textSize="30dp"
 android:textColor="@color/orange"
 counter:autoStart="true"
 counter:startValue="100"
 counter:endValue="5000"
 counter:incrementValue="100"
 counter:timeInterval="2"
 counter:prefix="$"
 counter:suffix=" moneys"
 counter:type="integer | decimal | both"
        />

final CounterView counterView = new CounterView(context);

counterView.setFormatter(new Formatter() {
 @Override
 public String format(String prefix, String suffix, float value) {
 return prefix 
 + NumberFormat.getNumberInstance(Locale.US).format(value) 
 + suffix;
 }
});
counterView.setAutoStart(false);
counterView.setStartValue(200f);
counterView.setEndValue(1000f);
counterView.setIncrement(5f); // the amount the number increments at each time interval
counterView.setTimeInterval(2); // the time interval (ms) at which the text changes
counterView.setPrefix("You have ");
counterView.setSuffix(" points!");
counterView.start(); // you can start anytime if autostart is set to false